Loading...
Search for:
flat-sheets
0.008 seconds
Performance Comparison of Membrane Bioreactor and Activated Sludge Processes in Starch Wastewater Treatment
, M.Sc. Thesis Sharif University of Technology ; Shayegan, Jalaledin (Supervisor)
Abstract
In this study the performance of the conventional activated sludge and the membrane bioreactor systems were investigated and their operations were compared. . A membrane bioreactor and a conventional activated sludge system which includes one aeration basin and one settling tank were designed and constructed. The feed was synthetic and the BOD:N:P ratio was 100:5:1. In order to starting the systems, the sludge supplied from the municipal wastewater treatment plant and inoculated. Then, the inoculated sludge was adapted to treat the starch wastewater with step by step increasing the feed COD. . The performance of two systems investigated in inlet COD=2500 mg/L and four hydraulic retention...
Crude oil desalter effluent treatment by a hybrid UF/RO membrane separation process
, Article Desalination ; Volume 238, Issue 1-3 , 2009 , Pages 174-182 ; 00119164 (ISSN) ; Roostaazad, R ; Hesampour, M ; Sharif University of Technology
2009
Abstract
Crude oil desalter effluent from a Tehran oil refinery was treated by a hybrid UF/RO membrane separation process. Ultrafiltration (UF) was used primarily to remove the emulsified oil droplets followed by the removal of total dissolved solids (TDS) via reverse osmosis (RO). The UF membrane was a hydrophilic flat sheet polysulfone ultrafiltration membrane with MWCO of 100 kDa while the RO membrane was a spiral-wound thin-film composite polyamide. Effect of operating conditions such as transmembrane pressure and crossflow velocity were studied in UF pretreatment. The experimental results showed that the UF membrane removed more than 75% of the oil and can be considered as an effective...
Virtual address space mapping for IP auto-configuration in MANET with security capability
, Article Proceedings of the 2008 International Conference on Advanced Infocomm Technology, ICAIT '08, 29 July 2008 through 31 July 2008, Shenzhen ; 2008 ; 9781605580883 (ISBN) ; Tajamolian, M ; Dehghan, M ; Mousavi, R ; Sharif University of Technology
2008
Abstract
Mobile Ad Hoc Networks (MANETs) are networks with selforganizing capabilities and without a fixed infrastructure. Wireless nodes communicate among themselves using multi-hop radio relaying, without requiring the packets to pass through a central access point or a base station. In a highly mobile and infrastructure-less scenario, pre-configuration of addresses is not possible. Therefore node addresses need to be configured dynamically with minimum delay and packet loss. Existing solutions for IP address auto-configuration do not address security issues. In this paper we propose a secure address autoconfiguration for Mobile Ad hoc Networks (MANET) based on Virtual Address Space Mapping [1]....
A new flat sheet membrane bioreactor hybrid system for advanced treatment of effluent, reverse osmosis pretreatment and fouling mitigation
, Article Bioresource Technology ; Volume 192 , 2015 , Pages 177-184 ; 09608524 (ISSN) ; Bidhendi, G. N ; Torabian, A ; Mehrdadi, N ; Pourabdullah, M ; Sharif University of Technology
Abstract
This paper introduces a new hybrid electro membrane bioreactor (HEMBR) for reverse osmosis (RO) pretreatment and advanced treatment of effluent by simultaneously integrating electrical coagulation (EC) with a membrane bioreactor (MBR) and its performance was compared with conventional MBR. Experimental results and their statistical analysis showed removal efficiency for suspended solids (SS) of almost 100% for both reactors. HEMBR removal of chemical oxygen demand (COD) improved by 4% and membrane fouling was alleviated according to transmembrane pressure (TMP). The average silt density index (SDI) of HEMBR permeate samples was slightly better indicating less RO membrane fouling. Moreover,...